/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:48:33,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:48:33,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:48:33,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:48:33,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:48:33,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:48:33,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:48:33,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:48:33,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:48:33,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:48:33,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:48:33,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:48:33,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:48:33,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:48:33,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:48:33,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:48:33,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:48:33,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:48:33,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:48:33,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:48:33,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:48:33,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:48:33,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:48:33,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:48:33,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:48:33,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:48:33,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:48:33,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:48:33,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:48:33,193 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:48:33,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:48:33,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:48:33,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:48:33,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:48:33,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:48:33,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:48:33,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:48:33,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:48:33,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:48:33,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:48:33,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:48:33,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 15:48:33,233 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:48:33,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:48:33,234 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:48:33,234 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:48:33,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:48:33,235 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:48:33,235 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:48:33,235 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:48:33,235 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:48:33,235 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:48:33,236 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:48:33,236 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:48:33,236 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:48:33,236 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:48:33,236 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:48:33,237 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:48:33,237 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:48:33,237 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:48:33,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:48:33,237 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:48:33,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:48:33,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:48:33,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:48:33,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:48:33,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:48:33,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:48:33,238 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:48:33,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:48:33,239 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:48:33,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:48:33,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:48:33,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:48:33,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:48:33,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:48:33,240 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:48:33,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:48:33,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:48:33,240 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:48:33,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:48:33,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:48:33,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:48:33,240 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:48:33,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:48:33,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:48:33,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:48:33,451 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:48:33,451 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:48:33,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-04-02 15:48:34,559 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:48:34,785 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:48:34,786 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-04-02 15:48:34,792 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0fae7d4c/a94f594887ff42b5978677dd5ab58a08/FLAGc8c6f1fd2 [2023-04-02 15:48:34,803 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0fae7d4c/a94f594887ff42b5978677dd5ab58a08 [2023-04-02 15:48:34,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:48:34,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:48:34,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:48:34,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:48:34,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:48:34,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:48:34" (1/1) ... [2023-04-02 15:48:34,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f27b97c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:34, skipping insertion in model container [2023-04-02 15:48:34,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:48:34" (1/1) ... [2023-04-02 15:48:34,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:48:34,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:48:34,965 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2023-04-02 15:48:35,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:48:35,014 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:48:35,023 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2023-04-02 15:48:35,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:48:35,071 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:48:35,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:35 WrapperNode [2023-04-02 15:48:35,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:48:35,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:48:35,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:48:35,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:48:35,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:35" (1/1) ... [2023-04-02 15:48:35,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:35" (1/1) ... [2023-04-02 15:48:35,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:35" (1/1) ... [2023-04-02 15:48:35,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:35" (1/1) ... [2023-04-02 15:48:35,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:35" (1/1) ... [2023-04-02 15:48:35,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:35" (1/1) ... [2023-04-02 15:48:35,110 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:35" (1/1) ... [2023-04-02 15:48:35,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:35" (1/1) ... [2023-04-02 15:48:35,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:48:35,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:48:35,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:48:35,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:48:35,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:35" (1/1) ... [2023-04-02 15:48:35,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:48:35,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:35,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 15:48:35,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 15:48:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:48:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:48:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:48:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:48:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-04-02 15:48:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-04-02 15:48:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2023-04-02 15:48:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:48:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:48:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:48:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:48:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:48:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 15:48:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 15:48:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:48:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-04-02 15:48:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-04-02 15:48:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2023-04-02 15:48:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:48:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:48:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:48:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:48:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:48:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:48:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:48:35,247 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:48:35,251 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:48:35,766 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:48:35,987 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:48:35,987 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 15:48:35,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:48:35 BoogieIcfgContainer [2023-04-02 15:48:35,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:48:35,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:48:35,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:48:35,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:48:35,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:48:34" (1/3) ... [2023-04-02 15:48:35,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e98eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:48:35, skipping insertion in model container [2023-04-02 15:48:35,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:35" (2/3) ... [2023-04-02 15:48:35,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e98eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:48:35, skipping insertion in model container [2023-04-02 15:48:35,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:48:35" (3/3) ... [2023-04-02 15:48:35,997 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2023-04-02 15:48:36,017 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:48:36,017 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:48:36,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:48:36,069 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c89e59e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:48:36,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:48:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 44 states have internal predecessors, (59), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 15:48:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 15:48:36,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:36,082 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:48:36,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:36,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:36,087 INFO L85 PathProgramCache]: Analyzing trace with hash 752815821, now seen corresponding path program 1 times [2023-04-02 15:48:36,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:36,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746455567] [2023-04-02 15:48:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:36,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:48:36,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:36,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746455567] [2023-04-02 15:48:36,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746455567] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:48:36,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:48:36,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 15:48:36,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633532634] [2023-04-02 15:48:36,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:48:36,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 15:48:36,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:36,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 15:48:36,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-02 15:48:36,802 INFO L87 Difference]: Start difference. First operand has 62 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 44 states have internal predecessors, (59), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:48:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:37,062 INFO L93 Difference]: Finished difference Result 144 states and 228 transitions. [2023-04-02 15:48:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 15:48:37,065 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-04-02 15:48:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:37,072 INFO L225 Difference]: With dead ends: 144 [2023-04-02 15:48:37,072 INFO L226 Difference]: Without dead ends: 85 [2023-04-02 15:48:37,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-02 15:48:37,077 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 31 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:48:37,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 470 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 15:48:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-04-02 15:48:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2023-04-02 15:48:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 45 states have internal predecessors, (56), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2023-04-02 15:48:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2023-04-02 15:48:37,114 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 30 [2023-04-02 15:48:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:37,115 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2023-04-02 15:48:37,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:48:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2023-04-02 15:48:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 15:48:37,117 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:37,117 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:48:37,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 15:48:37,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:37,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:37,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1477785470, now seen corresponding path program 1 times [2023-04-02 15:48:37,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:37,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340643190] [2023-04-02 15:48:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:37,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 15:48:37,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:37,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340643190] [2023-04-02 15:48:37,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340643190] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:37,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073476252] [2023-04-02 15:48:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:37,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:37,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:37,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:48:37,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 15:48:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:37,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 15:48:37,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:48:37,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:48:38,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073476252] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:48:38,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1570082132] [2023-04-02 15:48:38,243 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-02 15:48:38,244 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:48:38,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:48:38,253 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:48:38,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:48:38,306 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:48:38,826 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 32 for LOIs [2023-04-02 15:48:39,119 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 15:48:39,124 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:48:39,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:48:39,165 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:48:41,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '592#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:48:41,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:48:41,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:48:41,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2023-04-02 15:48:41,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262940027] [2023-04-02 15:48:41,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:48:41,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 15:48:41,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:41,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 15:48:41,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1815, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 15:48:41,201 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 22 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-02 15:48:41,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:41,857 INFO L93 Difference]: Finished difference Result 182 states and 260 transitions. [2023-04-02 15:48:41,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 15:48:41,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 34 [2023-04-02 15:48:41,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:41,860 INFO L225 Difference]: With dead ends: 182 [2023-04-02 15:48:41,860 INFO L226 Difference]: Without dead ends: 125 [2023-04-02 15:48:41,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=236, Invalid=2844, Unknown=0, NotChecked=0, Total=3080 [2023-04-02 15:48:41,863 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 76 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:48:41,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 796 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 15:48:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-04-02 15:48:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2023-04-02 15:48:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 48 states have internal predecessors, (59), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2023-04-02 15:48:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2023-04-02 15:48:41,876 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 34 [2023-04-02 15:48:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:41,877 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2023-04-02 15:48:41,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-02 15:48:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2023-04-02 15:48:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 15:48:41,880 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:41,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:48:41,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 15:48:42,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:42,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:42,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:42,088 INFO L85 PathProgramCache]: Analyzing trace with hash -212743530, now seen corresponding path program 1 times [2023-04-02 15:48:42,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:42,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269201351] [2023-04-02 15:48:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:42,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:48:42,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:42,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269201351] [2023-04-02 15:48:42,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269201351] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:42,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553184904] [2023-04-02 15:48:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:42,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:42,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:42,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:48:42,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 15:48:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:42,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 15:48:42,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:48:42,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:48:42,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553184904] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:48:42,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427503223] [2023-04-02 15:48:42,594 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-02 15:48:42,594 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:48:42,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:48:42,595 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:48:42,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:48:42,610 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:48:42,762 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 13 for LOIs [2023-04-02 15:48:42,768 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:48:42,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:48:42,786 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:48:43,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [427503223] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:48:43,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:48:43,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [9, 11, 9] total 43 [2023-04-02 15:48:43,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351258241] [2023-04-02 15:48:43,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:48:43,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 15:48:43,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:43,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 15:48:43,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 15:48:43,607 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 15:48:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:45,735 INFO L93 Difference]: Finished difference Result 116 states and 163 transitions. [2023-04-02 15:48:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 15:48:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2023-04-02 15:48:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:45,737 INFO L225 Difference]: With dead ends: 116 [2023-04-02 15:48:45,737 INFO L226 Difference]: Without dead ends: 102 [2023-04-02 15:48:45,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=414, Invalid=3246, Unknown=0, NotChecked=0, Total=3660 [2023-04-02 15:48:45,740 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 231 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 15:48:45,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 6 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 15:48:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-02 15:48:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2023-04-02 15:48:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 55 states have internal predecessors, (67), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (22), 15 states have call predecessors, (22), 14 states have call successors, (22) [2023-04-02 15:48:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 105 transitions. [2023-04-02 15:48:45,761 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 105 transitions. Word has length 35 [2023-04-02 15:48:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:45,761 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 105 transitions. [2023-04-02 15:48:45,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 15:48:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 105 transitions. [2023-04-02 15:48:45,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 15:48:45,762 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:45,763 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:48:45,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 15:48:45,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 15:48:45,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:45,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:45,969 INFO L85 PathProgramCache]: Analyzing trace with hash -108980622, now seen corresponding path program 1 times [2023-04-02 15:48:45,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:45,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402117522] [2023-04-02 15:48:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:45,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:48:46,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:46,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402117522] [2023-04-02 15:48:46,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402117522] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:48:46,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:48:46,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-02 15:48:46,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417621550] [2023-04-02 15:48:46,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:48:46,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 15:48:46,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:46,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 15:48:46,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-04-02 15:48:46,489 INFO L87 Difference]: Start difference. First operand 78 states and 105 transitions. Second operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 15:48:47,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:47,221 INFO L93 Difference]: Finished difference Result 118 states and 157 transitions. [2023-04-02 15:48:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 15:48:47,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2023-04-02 15:48:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:47,226 INFO L225 Difference]: With dead ends: 118 [2023-04-02 15:48:47,226 INFO L226 Difference]: Without dead ends: 99 [2023-04-02 15:48:47,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2023-04-02 15:48:47,228 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 89 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 15:48:47,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 802 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 15:48:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-04-02 15:48:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2023-04-02 15:48:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 55 states have internal predecessors, (68), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2023-04-02 15:48:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2023-04-02 15:48:47,247 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 36 [2023-04-02 15:48:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:47,247 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2023-04-02 15:48:47,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 15:48:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2023-04-02 15:48:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 15:48:47,248 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:47,249 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:48:47,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 15:48:47,249 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:47,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash 305031568, now seen corresponding path program 1 times [2023-04-02 15:48:47,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:47,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468004903] [2023-04-02 15:48:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:47,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:48:47,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468004903] [2023-04-02 15:48:47,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468004903] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045523503] [2023-04-02 15:48:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:47,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:47,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:47,401 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:48:47,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 15:48:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:47,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 15:48:47,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:48:47,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:48:47,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045523503] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:48:47,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1217914041] [2023-04-02 15:48:47,755 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-02 15:48:47,755 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:48:47,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:48:47,756 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:48:47,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:48:47,770 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:48:47,932 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 13 for LOIs [2023-04-02 15:48:47,940 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:48:47,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:48:47,980 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:48:48,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1217914041] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:48:48,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:48:48,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 11, 9] total 45 [2023-04-02 15:48:48,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765477827] [2023-04-02 15:48:48,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:48:48,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 15:48:48,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:48,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 15:48:48,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 15:48:48,922 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 24 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 15:48:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:51,291 INFO L93 Difference]: Finished difference Result 134 states and 193 transitions. [2023-04-02 15:48:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 15:48:51,292 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 38 [2023-04-02 15:48:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:51,293 INFO L225 Difference]: With dead ends: 134 [2023-04-02 15:48:51,293 INFO L226 Difference]: Without dead ends: 111 [2023-04-02 15:48:51,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=492, Invalid=3930, Unknown=0, NotChecked=0, Total=4422 [2023-04-02 15:48:51,296 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 241 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 15:48:51,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 6 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 15:48:51,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-02 15:48:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2023-04-02 15:48:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.309090909090909) internal successors, (72), 59 states have internal predecessors, (72), 18 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) [2023-04-02 15:48:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 116 transitions. [2023-04-02 15:48:51,315 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 116 transitions. Word has length 38 [2023-04-02 15:48:51,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:51,316 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 116 transitions. [2023-04-02 15:48:51,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 15:48:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 116 transitions. [2023-04-02 15:48:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 15:48:51,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:51,317 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:48:51,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 15:48:51,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:51,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:51,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:51,524 INFO L85 PathProgramCache]: Analyzing trace with hash 59574127, now seen corresponding path program 2 times [2023-04-02 15:48:51,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:51,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291550732] [2023-04-02 15:48:51,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:51,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 15:48:51,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:51,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291550732] [2023-04-02 15:48:51,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291550732] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:48:51,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:48:51,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-02 15:48:51,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395895256] [2023-04-02 15:48:51,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:48:51,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 15:48:51,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:51,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 15:48:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-04-02 15:48:51,957 INFO L87 Difference]: Start difference. First operand 82 states and 116 transitions. Second operand has 13 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:48:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:52,331 INFO L93 Difference]: Finished difference Result 133 states and 193 transitions. [2023-04-02 15:48:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 15:48:52,331 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-04-02 15:48:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:52,333 INFO L225 Difference]: With dead ends: 133 [2023-04-02 15:48:52,333 INFO L226 Difference]: Without dead ends: 131 [2023-04-02 15:48:52,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-04-02 15:48:52,334 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 60 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 15:48:52,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 891 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 15:48:52,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-02 15:48:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 105. [2023-04-02 15:48:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 70 states have (on average 1.3) internal successors, (91), 75 states have internal predecessors, (91), 23 states have call successors, (23), 9 states have call predecessors, (23), 11 states have return successors, (39), 22 states have call predecessors, (39), 21 states have call successors, (39) [2023-04-02 15:48:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 153 transitions. [2023-04-02 15:48:52,366 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 153 transitions. Word has length 38 [2023-04-02 15:48:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:52,367 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 153 transitions. [2023-04-02 15:48:52,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:48:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 153 transitions. [2023-04-02 15:48:52,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 15:48:52,370 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:52,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:48:52,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 15:48:52,370 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:52,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:52,371 INFO L85 PathProgramCache]: Analyzing trace with hash -92230730, now seen corresponding path program 1 times [2023-04-02 15:48:52,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:52,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471059986] [2023-04-02 15:48:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:52,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 15:48:52,484 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 15:48:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 15:48:52,543 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-02 15:48:52,543 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 15:48:52,544 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 15:48:52,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 15:48:52,548 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-04-02 15:48:52,550 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 15:48:52,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 03:48:52 BoogieIcfgContainer [2023-04-02 15:48:52,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 15:48:52,591 INFO L158 Benchmark]: Toolchain (without parser) took 17784.78ms. Allocated memory was 295.7MB in the beginning and 426.8MB in the end (delta: 131.1MB). Free memory was 252.8MB in the beginning and 365.1MB in the end (delta: -112.3MB). Peak memory consumption was 19.8MB. Max. memory is 8.0GB. [2023-04-02 15:48:52,591 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 196.1MB. Free memory is still 143.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 15:48:52,591 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.31ms. Allocated memory is still 295.7MB. Free memory was 252.8MB in the beginning and 239.2MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-02 15:48:52,591 INFO L158 Benchmark]: Boogie Preprocessor took 41.97ms. Allocated memory is still 295.7MB. Free memory was 239.2MB in the beginning and 237.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 15:48:52,592 INFO L158 Benchmark]: RCFGBuilder took 874.24ms. Allocated memory is still 295.7MB. Free memory was 236.6MB in the beginning and 167.9MB in the end (delta: 68.7MB). Peak memory consumption was 68.2MB. Max. memory is 8.0GB. [2023-04-02 15:48:52,592 INFO L158 Benchmark]: TraceAbstraction took 16597.92ms. Allocated memory was 295.7MB in the beginning and 426.8MB in the end (delta: 131.1MB). Free memory was 167.4MB in the beginning and 365.1MB in the end (delta: -197.7MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 15:48:52,593 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 196.1MB. Free memory is still 143.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 265.31ms. Allocated memory is still 295.7MB. Free memory was 252.8MB in the beginning and 239.2MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.97ms. Allocated memory is still 295.7MB. Free memory was 239.2MB in the beginning and 237.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 874.24ms. Allocated memory is still 295.7MB. Free memory was 236.6MB in the beginning and 167.9MB in the end (delta: 68.7MB). Peak memory consumption was 68.2MB. Max. memory is 8.0GB. * TraceAbstraction took 16597.92ms. Allocated memory was 295.7MB in the beginning and 426.8MB in the end (delta: 131.1MB). Free memory was 167.4MB in the beginning and 365.1MB in the end (delta: -197.7MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 110, overapproximation of bitwiseAnd at line 76. Possible FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; VAL [ea=127, eb=126, ma=33554432] [L251] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L251] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=126, ma=33554432] [L251] zero = base2flt(0, 0) [L252] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L29] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L57] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L59] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L64] COND TRUE e >= 127 [L65] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L80] return (__retres4); [L252] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=126, ma=33554432, zero=0] [L252] a = base2flt(ma, ea) [L253] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=126, \old(m)=33554431] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=126, \old(m)=33554431, e=126, m=33554431] [L29] COND FALSE !(! m) VAL [\old(e)=126, \old(m)=33554431, e=126, m=33554431] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=126, \old(m)=33554431, e=126, m=33554431] [L57] COND TRUE 1 VAL [\old(e)=126, \old(m)=33554431, e=126, m=33554431] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=126, \old(m)=33554431, e=126, m=33554431] [L76] EXPR m & ~ (1U << 24U) [L76] m = m & ~ (1U << 24U) [L77] EXPR m | ((unsigned int )(e + 128) << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=126, \old(m)=33554431, __retres4=4294967295, e=126, m=33554431, res=4294967295] [L80] return (__retres4); [L253] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=8589934591, ea=127, eb=126, ma=33554432, mb=33554431, zero=0] [L253] b = base2flt(mb, eb) [L255] COND FALSE !(a < zero) [L258] COND TRUE a > zero [L259] tmp = 1 [L263] sa = tmp [L265] COND FALSE !(b < zero) [L268] COND TRUE b > zero [L269] tmp___0 = 1 [L273] sb = tmp___0 VAL [a=4294967295, b=4294967295, ea=127, eb=126, ma=33554432, mb=33554431, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L276] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=4294967295] [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; [L94] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, tmp=4294967295] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] EXPR ma | (1U << 24U) [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] EXPR mb | (1U << 24U) [L113] mb = mb | (1U << 24U) [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.5s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 763 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 728 mSDsluCounter, 2971 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2710 mSDsCounter, 224 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3479 IncrementalHoareTripleChecker+Invalid, 3703 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 224 mSolverCounterUnsat, 261 mSDtfsCounter, 3479 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 472 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=6, InterpolantAutomatonStates: 121, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 180 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 356 NumberOfCodeBlocks, 356 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 413 ConstructedInterpolants, 0 QuantifiedInterpolants, 1214 SizeOfPredicates, 23 NumberOfNonLiveVariables, 404 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 108/148 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 10, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 55, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 48, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 32, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 20, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 100, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 149, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 27, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 55, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 20, CALL_SUMMARIZER_CACHE_MISSES: 6, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 530, DAG_COMPRESSION_RETAINED_NODES: 161, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-04-02 15:48:52,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...